AT83C5135 Atmel Corporation, AT83C5135 Datasheet - Page 17
AT83C5135
Manufacturer Part Number
AT83C5135
Description
Manufacturer
Atmel Corporation
Datasheet
1.AT83C5134.pdf
(166 pages)
Specifications of AT83C5135
Max. Operating Frequency
32 MHz
Cpu
8051-12C
Max I/o Pins
34
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
1
Twi (i2c)
1
Uart
1
Sram (kbytes)
1.25
Eeprom (bytes)
512
Operating Voltage (vcc)
2.7 to 3.6
Timers
4
Mask Rom (kbytes)
16
Watchdog
Yes
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7683C–USB–11/07
Table 6-3.
Reset Value = 0000 0000b
Table 6-4.
Reset Value = 0000 0000b
Table 6-5.
Reset Value = 0000 0000
Bit Number
Bit Number
Bit Number
7-1
7-3
7-4
3-0
R3
7
0
7
2
1
0
7
-
-
Mnemonic
Mnemonic
Mnemonic
CKCON1 (S:AFh)
Clock Control Register 1
PLLCON (S:A3h)
PLL Control Register
PLLDIV (S:A4h)
PLL Divider Register
PLOCK
PLLEN
EXT48
SPIX2
R3:0
N3:0
Bit
Bit
R2
Bit
6
6
6
-
-
-
-
Description
Reserved
The value read from this bit is always 0. Do not set this bit.
SPI Clock
This control bit is validated when the CPU clock X2 is set. When X2 is low, this bit
has no effect.
Clear to select 6 clock periods per peripheral clock cycle.
Set to select 12 clock periods per peripheral clock cycle.
Description
Reserved
The value read from this bit is always 0. Do not set this bit.
External 48 MHz Enable Bit
Set this bit to bypass the PLL and disable the crystal oscillator.
Clear this bit to select the PLL output as USB clock and to enable the crystal oscillator.
PLL Enable Bit
Set to enable the PLL.
Clear to disable the PLL.
PLL Lock Indicator
Set by hardware when PLL is locked.
Clear by hardware when PLL is unlocked.
Description
PLL R Divider Bits
PLL N Divider Bits
R1
5
5
5
-
-
R0
4
4
4
-
-
N3
3
3
3
-
-
AT83C5134/35/36
EXT48
N2
2
2
2
-
PLLEN
N1
1
1
1
-
PLOCK
SPIX2
N0
0
0
0
17
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